TIME-VARYING WIDEBAND UNDERWATER ACOUSTIC CHANNEL ESTIMATION FOR OFDM COMMUNICATIONS

被引：9

作者：

Josso, N. F. ^{[1
]}

Zhang, J. J. ^{[2
]}

Fertonani, D. ^{[2
]}

Papandreou-Suppappola, A. ^{[2
]}

Duman, T. M. ^{[2
]}

机构：

[1] Grenoble Inst Technol, GIPSA Lab DIS, Grenoble, France

[2] Arizona State Univ, SenSIP Ctr, Sch ECEE, Tempe, AZ 85287 USA

来源：

2010 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING | 2010年

关键词：

Underwater acoustic channel; wideband spreading function; channel estimation; OFDM;

D O I：

10.1109/ICASSP.2010.5495257

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

We investigate two methods for estimating the matched signal transformations caused by time-varying underwater acoustic channels in orthogonal frequency division multiplexing (OFDM) communication systems. The underwater acoustic channel for this 12-20 kHz medium frequency range OFDM system is best modeled using multipath and wide-band Doppler scale changes on the transmitted signal. As a result, our first channel estimation method is based on discretizing the wideband spreading function time-scale representation of the channel output using the Mellin transform. The second method is based on extracting the time-scale features of distinct ray paths in the received signal using a modified matching pursuit decomposition algorithm. We validate and discuss both methods using data from the recent Kauai Acomms MURI 2008 (KAM08) underwater acoustic communication experiment.

引用

页码：5626 / 5629

页数：4

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